ELECTRET AND ELECTRET CAPACITOR MICROPHONE
To provide an electret having high surface charge density, and to provide an electret capacitor microphone that has the electret.The electret contains a fluorine aromatic resin consisting mainly of a fluorine aromatic polymer. The electr...

JP2009088100A

MATERIAL FOR ELECTRET, AND ELECTRET COMPONENT USING THE SAME
To provide a material for an electret having an excellent adhesion to a metallic base and a high heat resistive charge storage rate, and to provide an electret component using the electret material.A material 10 of an electret includes a...

JP2009076613A

ELECTROSTATIC OPERATION DEVICE
To provide an electrostatic operation device capable of suppressing discharge of electric charges induced at an electrode through a spacer (projection portion) while suppressing contact between a first electrode portion and a second elec...

JP2009076788A

LAMINATED CERAMIC ELEMENT AND MOUNTING STRUCTURE THEREOF
To provide a laminated ceramic element capable of precisely detecting temperature, and to provide a mounting structure thereof.The mounting structure has an NTC capacitor 1, an NTC thermistor, a choke coil, a switching circuit, a feedbac...

EBG ELEMENT, ITS ARRAY STRUCTURE, AND HIGH-FREQUENCY CIRCUIT
To provide an EBG element capable of successfully performing leak cutoff to a broadband high-frequency circuit.An antenna 102 on an insulating film 101 of a substrate 100 is connected to a transmission path 104 in the insulating film 101...

JP2009016613A

CAPACITOR ARRAY
To miniaturize a device and to improve reliability.In the capacitor array incorporating a plurality of variable capacitors C1-C4, a plurality of positive and negative electrodes are alternately stacked for the respective variable capacit...

JP2009006313A

OILY MIST RESISTANT ELECTRET ARTICLE AND FILTER
To provide a novel electret article comprising a polymer exhibiting an excellent oily mist loading performance, low penetration, and a small pressure drop and a performance enhancing additive.Disclosed is an electret article in the form ...

CONTROLLER FOR VARACTORS
To improve yield or reliability of a variable-capacitance system in which multiple MEMS varactors including defective elements are integrated.A controller 100 for variable-capacitance elements has a directive means 108 for directing cont...

ELECTRET ELEMENT, AND ELECTROSTATIC OPERATION DEVICE
To provide an electret element capable of suppressing the reduction of charge to be stored in an electret film.The electret element 100 has: the electret film 2 capable of storing charge; and a charge outflow control film 3 that is forme...

JP2008277996A

VARIABLE CAPACITANCE CAPACITOR, FILTER CIRCUIT
To provide a variable capacitance capacitor which can easily control the characteristics, and to provide a filter circuit.The variable capacitance capacitor includes a variable capacitance element group, comprising a plurality of variabl...

ANTENNA DEVICE AND MOBILE TERMINAL
To provide an antenna device that realizes transmission and reception, in a frequency band having a wide bandwidth.The antenna device is equipped with a variable capacitance capacitor C2 using a dielectric material, a capacitor C1 connec...

JP2008252340A

TUNABLE FILTER, AND MANUFACTURING METHOD THEREOF
To provide a tunable filter which is capable of efficiently varying a coupling capacitance between resonators with a simple structure and is suitable for integration.In the tunable filter 10, by arranging the two or more resonators 12a a...

FERROELECTRIC ANTENNA AND METHOD FOR TUNING THE SAME
To provide FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna.The method comprises forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a v...

RESONATOR AND ELECTRONIC APPARATUS
To provide a small and highly reliable resonator which is manufactured easily, and also to provide an electronic apparatus employing it.The present invention relates to a resonator comprising two acoustic impedance transducers T1, T2 and...

ELECTRET DEVICE AND ELECTROSTATIC OPERATING APPARATUS
To provide an electret device capable of increasing the surface potential of an electret film composed of a silicon oxide film.An electret device 10 includes a silicon substrate 1 having a groove 1b on the main surface 1a thereof and an ...

JP2008118070A

VARIABLE CAPACITANCE ELEMENT
To provide a variable capacitance element in which the passage of direct current is prevented.The variable capacitor element comprises: a first capacitative element 3 that has plate electrodes 3a and 3b opposed to each other via a ferroe...

JP2008112755A

METHOD AND APPARATUS FOR MAKING ELECTRET
To provide a new technique for making electret for a condensor microphone, capable of forming an electret of a dielectric film of a condensor microphone to be formed through micro-processing of a silicon substrate without laboring, and c...

JP2008112781A

ELECTRET ELEMENT AND ELECTROSTATIC OPERATION DEVICE
To provide an electret element capable of forming a region having high charge density on an electret film.The electret element 10 has: the electret film 2 capable of storing charge; and a charge outflow suppression film 3 that is formed ...

JP2008516444A

Varactor apparatus with little temperature dependency
[Subject] [Solution means] book invention is varactor apparatus (100) in which temperature stability has been improved, and is equipped with the 1st varactor (160) connected to the decoupling network (150). Apparatus is further equipped ...

JP2008108862A

CAPACITOR ELEMENT AND ITS MANUFACTURING METHOD
To enlarge a band which a capacitor can use.In the capacitor having a pair of electrodes and a dielectric sandwiched between a pair of the electrodes, a frequency with which orientation polarization of the dielectric dissipates is set to...

TUNABLE CAPACITOR USING ELECTROWETTING PHENOMENON
To provide a tunable capacitor using an electrowetting phenomenon, which facilitates a fabrication process, provides good reliability and durability, and has no limitation on a tuning range.The tunable capacitor includes a first electrod...

CAPACITOR AND HIGH FREQUENCY COMPONENT
To suppress a leakage current and an electrostatic breakdown generated at a dielectric film step portion due to surface roughness of a dielectric film, and to improve insulation of a variable capacitance capacitor.A lower electrode layer...

JP2008085081A

VARIABLE CAPACITOR
To provide a variable capacitor which has a large electrostatic capacity change to an applied voltage, and a high Q value.A first electrode layer 2 and a second electrode layer 3 are both formed of conductive material and provided confro...

JP2008072740A

TUNABLE MULTIPLEXER
To provide an appropriate tunable multiplexer.The present invention provides a tunable ferro-electric multiplexer for use in CDMA communication devices. Tunable ferro-electric capacitors are used to tune the resonant frequencies of sever...

JP2008066682A

VARIABLE CAPACITOR
To provide a variable capacitor capable of realizing both of lowering of a bias voltage and the maximization of an electrostatic capacitance changing rate.This variable capacitor comprises, a first capacitance portion which is formed by ...

JP2008053563A

TUNABLE CAPACITOR
To suppress a capacity while overcoming the difficulty of micro-fabrication, and to secure satisfactory tunability.Organic solvent containing SiO2 is spin-coated on the main face of a high dielectric layer 16, and heating and removal tre...

JP2008051511A

CAPACITANCE SENSOR AND ITS MANUFACTURING METHOD
To optimize each stress of a diaphragm and a plate of a capacitance sensor.This manufacturing method of the capacitance sensor comprises the steps of depositing a film to be a diaphragm forming a movable electrode, heating the film to be...

JP2008053400A

ELECTRET CONDENSER
To provide an electret condenser that has reliability in humidity-proofing properties and the like improved.The electret condenser includes a polysilicon film 115 used as a fixed electrode, a polysilicon film 102 opposite to the polysili...